West Bengal Pollution Control Board |
Siliguri Laboratory |
Paribesh Bhawan, Paribahan Nagar, P.O. Matigara, Siliguri,Darjeeling 734 428. |
| Station: River Raidak at Alipurduar | River Basin: Tista | CPCB Station Code: 4728 |
| Sample Date: 26/10/2021 | Sample Time: 13:30 | |
| Human Activities: None | Weather: Sunny | Water Body: Raidak |
| Frequency Of Monitoring: Monthly | Use Based Class: B | Approximate Depth(Bottom/Table): 1.00 m |
| Color & Intensity: Dark Green and clear | Odour: Fishy | Visible effluent discharge: None |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| Ammonia-N | BDL | mg/l |
| BOD | 1.40 | mg/l |
| Conductivity | 94.65 | µs/cm |
| Dissolved O2(DO) | 7.10 | mg/l |
| Fecal Coliform | 1700 | MPN/100ml |
| Fecal Streptococci | 12 | MPN/100ml |
| Nitrate-N | 0.02 | mg/l |
| pH | 7.20 | Unit |
| Temperature(Water) | 27 | ⁰C |
| Total Coliform | 5000 | MPN/100ml |
| Boron | 0.49 | mg/l |
| Calcium | 14.43 | mg/l |
| Chloride | 8.81 | mg/l |
| COD | 18.00 | mg/l |
| Fluoride | BDL | mg/l |
| Magnesium | 10.94 | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |
| Phosphate-P | 0.004 | mg/l |
| Potassium | BDL | mg/l |
| Sodium | 2.60 | mg/l |
| Sulphate | 1.94 | mg/l |
| Total Alkalinity | 38.00 | mg/l |
| Total Dissolved Solids(TDS) | 12.00 | mg/l |
| Total Fixed Solids(TFS) | 124.00 | mg/l |
| Total Hardness as CaCo3 | 70.00 | mg/l |
| Total Suspended Solids(TSS) | 10.00 | mg/l |
| Turbidity | 7.27 | NTU |